Corsi Collection of Decorative Stones

Page 6 of 10, showing 501 - 600 of 1000 stones.
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OUMNH number Name and quarry location Geological description
OUMNH number Name and quarry location Geological description
501stone 501 Giallo di Pigozzo, from Pigozzo, Val Squaranto; Verona, Veneto, Italy Burrowed fossiliferous micritic limestone with foraminifera and debris probably of bivalves.
502stone 502 Marmorato di Osimo, from Osimo, Ancona, Marches, Italy Burrowed nodular fossiliferous micritic limestone with abundant 'filaments' of Buchia/Posidonia (bivalves).
503stone 503 Palombino di Cesena, from Cesena in Emilia, Forli, Emilia-Romagno, Italy Micritic limestone showing faint iron-staining constrained by a system of healed microfractures.
504stone 504 Marmo venato di Tivoli, from Tivoli, Roma, Lazio, Italy Biomicrite with scattered dendritic manganese oxides. Side of specimen shows slumping and intraclasts in stylolitised shelly limestone. Note subsequent extensive fracturing, the fractures calcite-filled.
505stone 505 Marmo venato di Tivoli, from Tivoli, Roma, Lazio, Italy Recrystallised, probably originally bioturbated, micritic or microspar limestone with extensive stylolites and calcite filled fractures.
506stone 506 'Corso della mola di Sant'Ambrogio', from Sant' Ambrogio di Valpolicella, Verona, Veneto, Italy Recrystallised, probably originally bioturbated, micritic or microspar limestone with extensive stylolites and calcite filled fractures.
507stone 507 Pietra paesina, from Florence, Tuscany, Italy; and most probably from Valdarno Micritic limestone or calcareous marl from the Cretaceous Alberese Formation, with red hematitic specks and stylolites. Calcite-filled microfractures control iron-staining. Some dendritic Mn oxides emanate from the fractures.
508stone 508 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Calcite-filled microfractures control iron-staining. Some dendritic manganese oxides emanate from the fractures.
509stone 509 'Argilla di Terni', from Terni, Umbria, Italy; or may be Tivoli, Roma, Lazio, Italy Burrowed micrite/microsparite limestone with abundant calcispheres and conspicuous dissolution fabrics (dark seams).
510stone 510 Pietra paesina, from Florence, Tuscany, Italy; and most probably from the Valdarno Calcareous marl/marly limestone from the Upper Cretaceous Alberese Formation. Calcite-filled microfractures control extent of iron/manganese colouration. Note the prominent stylolites.
511stone 511 Alberese limestone, from Florence, Tuscany, Italy; and most probably from Valdarno Micritic limestone or calcareous marl from the Upper Cretaceous Alberese Formation. Fractures are calcite-filled.
512stone 512 Argilla antica, locality unknown Most probably a calcareous mudstone, it contains planktonic forams.
513stone 513 Palombino venato, locality unknown Algal limestone.
514stone 514 Argilla di Tivoli, from Tivoli, Roma, Lazio, Italy Brecciated fine-grained limestone. A fossiliferous biomicrite with scattered bioclasts (calcispheres or radiolaria). Fractures are calcite-filled.
515stone 515 Diaspro di Volterraio, from Volterraio, island of Elba, Livorno, Tuscany, Italy A siliceous argillaceous deposit, perhaps a deep sea red clay.
516stone 516 Mandolato di Verona, from Verona, Veneto, Italy Limestone. A burrowed biomicrite with abundant planktonic forams and calcispheres, cut by a calcite-filled fracture system and stylolites.
517stone 517 Rosso di Terni, from Terni, Umbria, Italy Limestone. A stylolitised burrowed biomicrite crowded with planktonic forams, calcispheres and other small bioclasts.
518stone 518 Rosso di Fuligno, from Foligno, Perugia, Umbria, Italy Calcarenite, with no obvious biogenic grains. Patchy areas of pyrite, and scattered dendrites of manganese/iron oxides are present.
519stone 519 Pietra paesina, from the province of Naples, Campania, Italy Micritic limestone or calcareous marl. Calcite-filled microfractures control iron-staining which together with Liesegang rings of colour, gives the 'paesina' effect. Some dendritic manganese oxides are evident.
520stone 520 Giallo di Mizzolle, from Mizolle, Val Pantena, Verona, Veneto, Italy Micritic limestone with abundant yellow rhombic microcrystals of calcite. It has spar-filled fractures and scattered dendritic manganese oxides.
521stone 521 Broccatello di Sentro, from the Verona area, Veneto, Italy. 'Sentro' is perhaps Centro. Brecciated limestone containing scattered yellow euhedral rhombs of calcite, and dendritic manganese oxides.
522stone 522 Pietra felce dell'Elba, pietra paesina, from the island of Elba, Livorno, Tuscany, Micritic limestone or calcareous marl showing minor fracture constrained iron-staining giving faint paesina effect. It has abundant areas of dendritic manganese oxides.
523stone 523 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation, showing minor fracture constrained iron-staining, and areas of dendritic manganese oxides.
524stone 524 landscape marble, alberese di Ponte a Rignano, from Ponte a Rignano, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation, showing well-developed dendrites of manganese oxides.
525stone 525 Breccia di Modena, from Modena, Emilia-Romagna, Italy Micrite/microsparite limestone with abundant bioclasts, extensively fractured and stylolitised. Dendritic iron and manganese oxides are developed along stylolites.
526stone 526 Breccia di Modena, from Modena, Emilia-Romagna, Italy Micrite/microsparite limestone with abundant bioclasts, extensively bioturbated, fractured and stylolitised. Dendritic iron and manganese oxides are developed along stylolites.
527stone 527 Calcare compatta di Pisa, from Pisa, Tuscany, Italy Micritic limestone containing scattered grains of quartz. Dendritic growths of manganese/iron oxides emanate from fractures and form discrete spots, and are particularly well developed on the unsawn reverse of the sample. Brown areas are filler/polishing compound.
528stone 528 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Calcite-filled microfractures control iron-staining, giving the 'paesina' effect. Minor dendritic manganese oxides emanate from the fractures.
529stone 529 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. Calcite-filled microfractures control iron-staining. Some dendritic Mn oxides emanate from the fractures.
530stone 530 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. Calcite-filled microfractures control iron-staining. Some dendritic Mn oxides emanate from the fractures.
531stone 531 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. Calcite-filled microfractures control iron-staining. It is cut by a large calcite-filled vein.
532stone 532 Pietra paesina, from Valdarno, Florence, Tuscany, Italy Micritic limestone or calcareous marl from the Cretaceous Alberese Formation. It is heavily iron-stained, the coloration constrained by abundant calcite-filled microfractures. Manganese oxide dendrite are also abundant.
533stone 533 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Liesegang rings of iron-staining colour the specimen.
534stone 534 Pietra paesina, from Civitavecchia, Rome, Lazio, Italy Micritic limestone or calcareous marl from the Cretaceous-Eocene Alberese Formation. Brown ferruginous calcite or siderite-filled veins cut the specimen and there is some pink coloration constrained by calcite-filled microfractures giving a faint 'paesina' effect.
535stone 535 Marmo rosso di Siracusa, from Syracuse, Sicily, Italy Perhaps a deep-water mudstone. The colours are diagenetic.
536stone 536 Diaspro tenero di Sicilia, tigrato di Trapani, from Custonaci, Trapani, Sicily, Italy Micritic or microsparite limestone containing a mass of Teredo or similar wood-boring bivalves; no evidence of the wood itself remeins.
537stone 537 Diaspro tenero di Sicilia, pietra topografica di Taormina, from Taormina, Messina, Sicily, Italy Micritic limestone or marl with diagenetic colouring. Veins and fractures are filled with calcite.
538stone 538 Alabastro di Siena, from Siena, Tuscany, Italy Banded yellow calcite, probably a compact banded travertine.
539stone 539 Fluorite with galena and baryte, from Crich, Derbyshire, England Hydrothermal vein deposit of colourless to yellow iron-stained fluorite with galena and white crested baryte. Fluorite zoned with inclusions of marcasite/pyrite.
540stone 540 Fluorite, Blue John, from Derbyshire, England Hydrothermal vein deposit of fluorite. The narrow purple-blue colour zone indicates it is the Blue John variety.
541stone 541 Fluorite, Blue John, from Castleton, Derbyshire, England Hydrothermal vein deposit of colour-zoned purple-blue/colourless fluorite, the variety known as Blue John. It has some yellow ferruginous staining.
542stone 542 Fluorite, from Crich, Derbyshire, England Hydrothermal vein deposit of colourless/iron-stained fluorite, in places showing zoning with inclusions of pyrite/marcasite. It also contains sparse euhedral crystals of sphalerite.
543stone 543 Blue John fluorite, from Castleton, Derbyshire, England Hydrothermal vein deposit of colour-zoned purple-blue/colourless fluorite, the variety known as Blue John.
544stone 544 Gesso di Castellina Marittima, alabastro di Castellina Marittima, alabastro di Volterra, from Castellina Marittima, Pisa, Tuscany, Italy Fine-grained compact gypsum (alabaster) with calcite-filled fractures.
545stone 545 Gesso di Volterra, alabastro di Volterra, from Volterra, Pisa, Tuscany, Italy Fine-grained compact gypsum (alabaster).
546stone 546 Gesso di Iesi, alabastro di Iesi, from Iesi, Ancona, Marches, Italy Fine-grained compact gypsum (alabaster) - nodular mass, fibrous towards margins.
547stone 547 Gesso di Matelica, alabastro di Matelica, from Matelica, Macerata, Marches, Italy Crystals of gypsum as dark 'spots', and small fragments of micritic limestone, in a matrix of fine-grained compact gypsum (alabaster).
548stone 548 Lumachella di San Vitale, from the province of Verona, Veneto, Italy Not Gypsum. A Lower Jurassic limestone; matrix is fossiliferous micrite/microspar with molluscan debris. The large white intraclasts are heavily recrystallised shells of 'Lithiotis' bivalves. It has abundant stylolites.
549stone 549 Gesso di Matelica, alabastro di Matelica, from Matelica, Macerata, Marches, Italy Micritic limestone containing bands of gypsum crystals, as spots and patches in fine-grained compact gypsum (alabaster).
550stone 550 Gesso di Matelica, alabastro di Matelica, from Matelica, Macerata, Marches, Italy Micritic limestone containing bands of gypsum crystals, as spots and patches in fine-grained compact gypsum (alabaster).
551stone 551 Fluorite, probably from Italy Banded colourless fluorite with inclusions of pyrite, and ?clay.
552stone 552 Gesso di Faenza, from Faenza, Ravenna, Emilia-Romagna, Italy Calcite-cemented breccia with small angular gypsum clasts, patches of micritic limestone and smaller dark grains.
553stone 553 Pietra rota degli Appennini, from the Apennines, Italy Quartzite with limonitic cement.
554stone 554 Arenaria di Brianza, from the Brianza area, Lombardy, Italy Fine-grained biocalcarenite with micritic/microspar matrix.
555stone 555 Arenaria di Siena, from Siena, Tuscany, Italy Bioclastic limestone with microspar matrix. It has white algal grains and spar-filled anastomising vugs, probably incipient birds-eyes.
556stone 556 Arenaria di Viggiù, from Viggiù, Varese, Lombardy, Italy Bioturbated fine biocalcarenite. The grains are predominantly echinoderm, probably crinoidal. It has solution seams/incipient stylolites.
557stone 557 Arenaria antica, locality unknown Originally a micritic limestone with indeterminate spar-filled ?brachiopods, this is now partly recrystallised.
558stone 558 'Arenaria di Corsica'; Corsica, France, is not confirmed. Impure medium-grained calcite marble, containing disseminated crystals of green chlorite and brown ferruginous matter which show a marked foliation.
559stone 559 Arenaria antica, locality unknown Coarse-grained biocalcarenite, with algal, foram, and molluscan grains dominant.
560stone 560 Lavagna antica, locality unknown Fine-grained siliceous rock with a few carbonate grains; The aggregates of orange-brown crystals are almost certainly relics of pyrite crystals; elsewhere, the pyrite is visible. Slate is not confirmed.
561stone 561 Lavagna di Cesena, from Cesena in Emilia, Forli, Emilia-Romagno, Italy Calcarenite with spar-filled fractures. Cubic pyrite crystals coat back of specimen.
562stone 562 Lavagna di Genoa, ardesia di Lavagna, from Genoa, Liguria, Italy Black slate. Fine-grained with fine layering and a few vein stringers parallel to the cleavage.
563stone 563 Marmo polveroso di Pistoia, from Pistoia, Tuscany, Italy Micritic limestone with abundant planktonic foraminifera.
564stone 564 Pietra alluminosa (alumstone), from Monti della Tolfa, near Civitavecchia, Rome, Lazio, Italy Alumstone. Medium- to fine-grained granular alunite with abundant cavities (vugs) lined with alunite crystals. Red/ brown is iron staining mainly in and around the vugs.
565stone 565 Verde antico, from Larissa, Thessaly, Greece A breccia of serpentinite, schistose calc-silicate and crystalline marble clasts in a lime-green serpentinite matrix.
566stone 566 Verde antico, from Larissa, Thessaly, Greece Breccia with clasts mainly of serpentinite/ophicalcite, a few of marble; extensive scattered crystals of oxide minerals, in a serpentine and calcite matrix. Heavily fractured, many fractures are filled with cross-fibres of chrysotile serpentine.
567stone 567 Serpentina verde ranocchia, from Wadi Umm Esh, Wadi Atalla region, Eastern Desert, Egypt; or a variety of verde di Polcevera, from Pietra Lavazzara, Genoa, Liguria, Italy Strongly sheared and serpentinised ultramafic rock with abundant granular patches and veinlets of black oxide minerals within the serpentine. Later veinlets of yellow serpentine cut the rock in sub-linear arrays.
568stone 568 Serpentina 'verde ranocchia', locality unknown Strongly-sheared and serpentinised ultramafic rock with abundant veinlets (some en echelon) and grains of oxide mineral within the serpentine, and minor veins of calcite.
569stone 569 Serpentina verde di Varallo, from Varallo, Novara, Piedmont, Italy Brecciated serpentinite-marble with light to dark green fragmented serpentinite clasts in fine-grained marble and vein calcite matrix. Serpentinite has local concentrations of fine-grained oxide mineral.
570stone 570 Serpentina verde di Varallo, from Varallo, Novara, Piedmont, Italy A sheared breccia of serpentinite clasts in fine-grained calcite matrix, with abundant streaks and grains of dark grey oxide minerals.
571stone 571 Serpentina verde di Susa, from Val di Susa, Turin, Piedmont, Italy Serpentinite veined with fine-grained grey calcite.
572stone 572 Serpentina verde di Susa, from Val di Susa, Turin, Piedmont, Italy Heavily fractured serpentinite, cemented with grey calcite.
573stone 573 Serpentina verde di Calabria, from Calabria, Italy Brecciated serpentinite.
574stone 574 Pietra Braschia, from The Western Alps Garnet peridotite showing reaction rims with radial structure around embayed garnets. The outer rim is probably granular pyroxene. The matrix is olivine-rich, recrystallised, with a tectonic fabric.
575stone 575 Serpentina di Valsabbia, from Valsabbia, Brescia, Lombardy, Italy Breccia with clasts mainly of serpentinite/ophicalcite, a few of marble.
576stone 576 Serpentina dell'Elba, from the island of Elba, Livorno, Tuscany, Italy Dark green serpentinite with colourless plagioclase porphyroblasts.
577stone 577 Verde ragano dell'Elba, from the island of Elba, Livorno, Tuscany, Italy Serpentinised peridotite with clear dextral shear fabric and augen up to a centimetre across.
578stone 578 Verde ranocchia, from Wadi Umm Esh, Eastern Desert, Egypt Serpentinite; a metamorphosed gabbro; most probably the Wadi Umm Esh/Atalla serpentinite.
579stone 579 Verde di Prato, from Prato, Florence, Tuscany, Italy Serpentinised peridotite (lherzolite) - coarse-grained, former olivine, orthopyroxene and clinopyroxene are still evident.
580stone 580 Verde di Prato, from Prato, Florence, Tuscany, Italy Serpentinised peridotite with coarse original texture, and fine detail in the serpentinisation (low temperature alteration) preserved. Vein is quartz.
581stone 581 Verde di Prato, from Prato, Florence, Tuscany, Italy Serpentinisied peridotite with pyroxenitic vein or band.
582stone 582 Verde tenero di Corsica, from Corsica, France Fine-grained quartz (chalcedony) rock, perhaps with relic textures of a granitic rock. Dendritic goethite emanates from the many fractures.
583stone 583 'Serpentina verde dell'Elba', from the island of Elba, Livorno, Tuscany, Italy Actinolite rock. Radiating crystals of actinolite; the surface is coated with brown filler.
584stone 584 Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy Brecciated serpentinite.
585stone 585 Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy Brecciated serpentinite.
586stone 586 Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy Brecciated serpentinite.
587stone 587 Serpentina verde di Polcevera, from Polcevera, Genoa, Liguria, Italy Brecciated serpentinite.
588stone 588 Serpentina di Corsica, from Corsica, France Amphibolite; probably mostly actinolite - mainly granular but fibrous/prismatic in veins. Irregular patches and veinlets of opaque oxide (probably magnetite). Contains disseminated pale yellow carbonate flecks.
589stone 589 Verde di Prato, from Prato, Florence, Tuscany, Italy Serpentinised coarse peridotite, and clear milky and fibrous serpentine veins. Various microstructures of alteration and exsolution in pyroxene visible on the slab surface. Note opaque white ?quartz veins and a few small calcite veins.
590stone 590 Verde di Prato, from Prato, Florence, Tuscany, Italy Serpentinised peridotite (lherzolite) - coarse-grained, former olivine, orthopyroxene and clinopyroxene are still evident.
591stone 591 Serpentina di Corsica, from Corsica, France Strongly altered and deformed coarse-grained former olivine gabbro. Note areas with disseminated pale yellow carbonate flecks.
592stone 592 Serpentina di Corsica, from Corsica, France Serpentinised harzburgite with coarse relict texture making it easy to distinguish former olivine and orthopyroxene domains. Note the chrysotile veins.
593stone 593 Marmo di Santa Cattarina dell'Elba, from the island of Elba, Livorno, Tuscany, Italy Serpentinite, finely brecciated and veined with calcite.
594stone 594 Serpentina verde di Genova, from Genoa, Liguria, Italy Brecciated serpentinite. Broken clasts of pale green serpentine, platey 'striped' dark green serpentine and brown/white marble in a matrix of brown and white calcite.
595stone 595 Serpentina di Chiavari, from Chiavari, Genoa, Liguria, Italy Altered peridotite. The green is mainly fine actinolite; whitish areas are scattered with tiny opaque flakes perhaps of chromite. The dark coloured oxide, probably magnetite, has with brown and green-black reaction rims.
596stone 596 Serpentina verde di Piombino, from Piombino, Livorno, Tuscany, Italy Green and white-banded L-S tectonite with low-strain augen. It is made almost entirely of narrow prismatic minerals, probably actinolite (green) and clinozoisite (white), strongly aligned in foliae, at high angles to fabric in augen. There are possibly some pyroxene relics in augen. These minerals suggest it could be derived from a rather melanocratic gabbro.
597stone 597 Serpentina verde di Genova, from Genoa, Liguria, Italy Metaperidotite - probably serpentine and actinolite.
598stone 598 Serpentina di Corsica, from Corsica, France Breccia of angular clasts of brown and pale green serpentinite in a paler coloured matrix with a reticulated system of very fine grey fibrous chrysotile veins throughout.
599stone 599 Serpentina delle Alpi, from the Alps (not confirmed) A hydrothermally altered mafic or ultramafic rock, most probably a serpentinised peridotite.
600stone 600 Serpentina delle Alpi, from the Alps (not confirmed) Serpentinite with calcite-filled veins and cavities.
Page 6 of 10, showing 501 - 600 of 1000 stones.
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